How to Sync Google Calendar
Created August 18, 2026
Device sync and overlay can stop when this-screen visibility was the whole job. Keeper.sh writes busy-block copies onto the calendar people actually book.
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Guides for each calendar provider, comparisons with other sync tools, and how Keeper.sh works. Weighing Keeper.sh against another tool? Read the comparison pages.
How to Sync Google Calendars Between Two Accounts
Created August 18, 2026
Overlay both Google accounts on this screen and they can stop. Keeper.sh writes busy-block copies of account A onto account B, the calendar people actually book.
How to Add Google Calendar to Outlook
Created August 16, 2026
Subscribe from web overlays this Outlook. Keeper.sh writes leftover busy-block copies onto the Outlook they actually use — or the reverse onto Google.
Apple Calendar Not Syncing: How to Find the Cause and Fix It
Created August 16, 2026
Work out whether the problem is iCloud itself, a subscribed calendar that is read-only by design, or a cross-account setup that was never going to sync both ways.
The Best Shared Calendar for Couples (2026): Four Setups, Four Trade-offs
Created August 16, 2026
Four situations, four different right answers. Which shared calendar suits you depends on the two phones involved and how much you actually want each other to see.
Google Calendar Not Syncing With iPhone: How to Diagnose and Fix It
Created August 16, 2026
A missing Google calendar on iPhone is usually a hide-toggle or an unticked box on Google's Calendar sync page, not a broken connection. When two calendars must carry the same hours as real events, Keeper.sh writes private copies; overlay and subscriptions cannot.
How to Add Google Calendar to iPhone
Created August 16, 2026
Add Account overlays this phone. Keeper.sh writes leftover busy-block copies onto signed-in iCloud, Outlook, or another Google.
How to Merge Calendars: Combine, Subscribe, or Sync
Created August 16, 2026
Overlaying calendars is a view. Subscribing is read-only and hours behind. Only one of the three options makes you actually look busy to someone trying to book you.
How to Share a Google Calendar
Created August 16, 2026
Add people and groups is the look/edit path. Keeper.sh writes private busy-block copies onto the calendar they already open.
How to Share a Calendar on iPhone
Created August 16, 2026
Apple's calendar sharing is all-or-nothing on detail: whoever you invite reads every title, location and note. Here is how to share a calendar from your iPhone, and how to hand over a link that shows your busy times only.
How to Share an Outlook Calendar
Created August 16, 2026
Share calendar is the look/edit path. Keeper.sh writes private busy-block copies onto the calendar they already open, without dumping titles.
How to Sync Apple Calendar to Google Calendar
Created August 16, 2026
Busy-block copies both ways: two mappings, one Apple ID. Overlay still leaves Google empty for the partner who books there.
How to Sync Outlook Calendar With Google Calendar
Created August 16, 2026
Copy Outlook hours onto Google Calendar as private busy blocks, even when the laptop is shut.
Outlook Calendar Not Syncing: How to Fix It, and When Outlook Cannot
Created August 16, 2026
Native resync can stop. Keeper.sh writes leftover busy-block copies onto the Outlook calendar they actually use — or the reverse.
How to Sync Google Calendar With iCloud
Created August 16, 2026
Copy Google hours onto a signed-in iCloud calendar as private busy blocks, not as an overlay in Calendar.app.
How to Sync Google Calendar With Outlook (Unattended)
Created August 16, 2026
Overlay shows Google in Outlook. It does not mark you busy for a colleague using Scheduling Assistant.
How to Give Claude Access to Your Calendar (MCP)
Created August 14, 2026
Sync calendars to Claude through keeper.sh. Desktop is a URL. Code is http. No key.
What an AI Agent Can Actually Do With Your Calendar
Created August 14, 2026
Once an assistant is connected to your calendar, what can it really do? All 14 tools, grouped by the job you would ask for, with the edges an honest capability list has to admit.
How Calendar Sync Actually Works, and Where It Breaks
Created August 11, 2026
Everything I learned building a calendar sync engine: how a change gets noticed, what stops two mirrored calendars flooding each other, what the clocks changing does to a repeating event, and why deletions are the hard part.
Open-Source Calendar Sync Tools Compared
Created August 11, 2026
Search for an open-source calendar sync tool and most of what comes back is a CalDAV server or an Android client. This sorts the projects by what they actually do.
How to Sync Fastmail Calendar with Google Calendar
Created August 11, 2026
Your dentist appointment is on Fastmail and your meetings are on Google, and neither one knows the other exists. Here is how to fix that in about ten minutes.
How to Sync Fastmail Calendar with Outlook
Created August 11, 2026
Fastmail and Outlook have no way to talk to each other. Here is how to get your Fastmail events appearing in Outlook, starting with the right app password.
How to Sync iCloud Calendar with Outlook
Created August 11, 2026
Your dentist appointment is in iCloud and your coworkers book you in Outlook. Here is how to make one show up as busy time in the other, starting with the Apple password step everyone gets stuck on.
How to Sync Nextcloud Calendar with Google Calendar
Created August 11, 2026
Your Nextcloud calendar has no idea your Google calendar exists. Here is how to get your events showing up on both, and what the copies actually look like.
How to Sync Nextcloud Calendar with Outlook
Created August 11, 2026
You run Nextcloud because your calendar should be yours. Then work hands you Outlook, and the two stop speaking. Here is how to bridge them, and where the sharp edges are.
How to Sync Radicale with iCloud Calendar
Created August 11, 2026
Radicale keeps your calendar on your own hardware and tells nothing else about it. Here is how to get those events onto your iPhone through iCloud.
Stop Getting Double-Booked Across Google, Outlook and iCloud
Created December 28, 2025
Four calendars across Google, Fastmail, and iCloud meant constant double-bookings. Keeper.sh blocks the same time everywhere, strips the details by default, and costs $5 a month no matter how many calendars you have.